Extractor ventilator



July 3, 1945. B. D. HUGHES ETAL 7 ,379,5

EXTRACTOR vmi'fiL-Awon A Filed Jan. 12, 194i? 2 Sheets-Sheet 1 B. D.HUGHES EIAL EXTRAGTOR VENTILATOR Filed Jan. 12, 1943 July 3, 1945.

2' Sheets-Sheet 2 FIG];

I 5Enzer tors. 6' 55nd Attorney Patented July 3, 1945 UNITED STATES AENTf l i nxrnecr oifi zgp gi Ford, Wembley, England I ApplicationJanuary 12, mn smnsenznt In Great Brit n J n ry22i1942 8 Claims. (Cl.98---8-4) This nvention relates to extractor ventilato and t has for itsobject the provision of a ventilater desi ned more perticularlyfor useon th side walls of ildings, cabins or vehicles tho it is equallyapplicable for use as a roof extractor, an essential feature of saidventilator being that t eilectively prevents he entry or ter and theexit-or light from within. j s

In the accompanying drawings which illustrate this invention t Figure 1is a side elevation partly in section of one embodiment of theinvention.

Figure .2 is a sectional side elevation of a fur-. ther embodiment.

u es 3 4, 5, 6, and 8 are similar views? f further embodiments, and

Figures 9 and are diagrammatic views, illustrating two furtherembodiments.

In the embodiment of the invention illustrated in Figure l, theventilator comprises a short length of tube I constituting the stackpipe, the

inner end of which is outwardly flared or of conical form. Ahorizontally disposed annular plate orring 2 which constitutes a surgeplate is furnished on its inner periphery with a flange, 3 by means ofwhich said surge plat is secured to the central tube Or stack pipe I. Acentrally apertured dome shaped element 4 and a shallow unapertured dishshaped element or cover member 5 are supported above the central tube Iby brackets 5 in the desired position relativelyto the central tube,surge plate and each other.v The peripheral edge of the unaperturedelement or cover member 5 is reversely curved as at 1 so that when theparts are assembledias showna .fiared aperture 8 is formed between theapertured. memher 4 and the cover member 5 which flaredaperture issurrounded by deflector means. comprisin a band 8 of conical form, themajor circumfer ence of which is outwardly flared as at it, saiddeflector band being maintained in the desired position by a. pluralityof brackets or spaci members H, The ventilator may be provided with awall (or roof) plate !2 furnished with a central flanged aperture towhich the dependin flan e 3 on the surge plate 2 may be secured or ifdesired a longer len th of stack pipe may be employed either in placechar in ddition to, th wall (or roof) plate. I In the embodiment of theinvention il strated in Figure 2, the horizontalsurge plate 2..i I reply a Vertically disposed cylindricaiplate 3 positioned pproximately midway between the peripheral edge of the apertured domesha'ped element 4and the deflector band .Inthis onstruction the elements 4 andi arespaced m r idely apartand the lement 4 is sup or d b and maintained inthe desired spaced relationship by a plurality of spacingm'embers l4 abolt or the like l5. Thedeilector :band- 9 and surge plate 3 aresupported on the wall (or roof) plate I27 by brackets 16 the upper endsof which also serve to support the cover member 5.

i According to, the embodiment of the invention illustrated in Figurethe stack pipe I, surge plate 2 and wall iorroof plate 12 areapproximatelyathe same 'asin' the construction shown in V Fi ure 1, butin this case the dome shaped element disposed above the upper end of thestack pipe comprises an un pertured element l1 supported'by the covermember 5. A vertically disposed deflector "sur e plate IB is secured bya horizonta y dispose flange 19 to the Wall plate Ilse as to vform anenclosure and prevent the entry of Water between the lower edge of thevdeflector surge plate l8 and the wall plate H. The deflector banal! is"pcsitionedaround the deflector sur e plate; 18 said band and the covermemher, 5 being su orted and ma ntained in their desired relativepositionsby a plurality of brackets 20 secured to the surge plate 18 asshown or in any other convenient manner, V i V The embodimentillustrated in Figure 4 is the same asth t in Figure 3 with. thisexception,

that the dome shaped element I1 is formed somev rse ycu d as'at 21,. V

e. embodim nt lustrated in Figure 5 is what. shal wer. and theperipheral edge is reagain practicallythe same as that in igure 3,

bu n is se he d f e or band 9 is vertically p sed a d p r e 'with thevertically d sposed surge P e t, The w r dge or the deflector band may,if desired, be outwardly flared as. in

, dicated' by broken lines at 22.

According to the further embodiment illustrated in'Figure 6, the annularring or surge plate secured to the stack pipe I is of conical .formdownwardly directed as at 2-3 and the vertically disposed surge plateisreplaced by a, horizontally disposed water bafile plate 24 extendinginwardly from the lower edge of the vertically disposed deflelctor band9 t o Within a short distance of the wall of stack pipe or central ductI. As shown the baffle plate 24 may be formed integrally the deflectorband 9, or, thetwo parts may be connected together by flanges,

Asshown in Figures, the stack pipe I may if desired be formed integrallywith the wall or roof plate l2.

A c rdingt he embodiment otthe invention illustrated in Figure '7,designed to produce a twin ejector action, the central element of theventilator comprising a stack pipe I, secured to a wall or roof platel2, a centrally apertured dished shaped element 4, an unapertured domeshaped element I1, and a shallow unapertured element or cover member 5,may be more widely spaced apart and surrounded by deflector meanscomprising a cylindrical inner deflector or surge plate 25 and outsidethis a pair of conical deflector bands 26 and 21 so arranged that theirmaximum diameters are flared and directedtowards each other. The stack lis provided adjacent its upper end with an annular conical ring28*constituting a surge plate. The several elements are maintained intheir relative positions by a plurality of spacing members I4, liandbrackets 29 arranged in any convenient manner.

According to a still further embodiment as illustrated in Figure 8 thecentral elements may be arranged as above described and be surrounded bydeflector means comprising a cylindrical inner deflector or surge plate30 of any convenient depth, and outside this a pair of conical deflectorbands 3|, 32 the maximum diameters of which are flared and downwardlydirected, said deflector means 30, 3i and 32 being maintained inposition by suitably disposed brackets 33, 34 the latterbeing also, ifdesired, arranged to support certain of the central elements. In thisembodiment a deflector plate 35 having anupwardly directed peripheraledge is secured to the base plate [2 and serves to deflect water or' airupwards on to the'deflector 32.

For. various purposes the number and arrangement of the outer deflectorbands may bebination a short stack pipe having a flared upper end, abase plate secured to said stack pipe, a dome shaped element arrangedabove, said stack pipe, a shallow dish shaped element, the peripheraledge of which is reversely curved-arranged above said dome shapedelement, at least one deflector surge plate surrounding said stack pipefor cooperation with the reversely curvededge of said dish-shapedelement to cause an outward deflection of the air flow, deflector meanssurround-' ing said elements and a plurality of brackets and spacingmembers for supporting the several elements and parts relatively. toeach other.

2. An extractor ventilator comprising in combination a short stack pipehaving a flared upper end, a base plate secured to the lower end of saidstack pipe, a deflectorsurge plate located below said flared upper endof and outwardly directed from said stack pipe, an unapertured domeshaped element arranged above said stack pipe, a shallow dish shapedelement, the peripheral edge of which is reversely curved, arrangedabove said unapertureddome shaped element, a vertically disposeddeflector surge plate surrounding said ing said elements and a pluralityof brackets and spacing members for supporting the several eleoutwardlydirected surge plate at a distance from ments and parts relatively toeach other.

3. An extractor ventilator comprising in combination a, short stack pipehaving a flared up-' per end, a base plate secured to the lower end ofsaid stack pipe, a horizontally disposed deflector surge plate securedto said stack pipe, a dome shaped element arranged above said stackpipe, a shallow dish shaped element, the peripheral edge of which isreversely curved, arranged above said dome shaped element, deflectormeans comprising an outer deflector band of conical formation the lowerpart of which is outwardly flared, the upper edge of said deflector bandbeing disposed substantially in the same plane as the peripheral edge ofsaid dish-shaped element, and a plurality of brackets and spacingmembers for supporting the several elements and parts relatively to eachother.

4. An extractor ventilator comprising in combination a-short stack pipehaving a flared upper end, a base plate secured to the lower end of saidstack pipe, a horizontally disposed deflector surge plate secured tosaid stack pipe, an apertured dome shaped element arranged above saidstack pipe, a shallow dish shaped element, the peripheral edge of whichis reversely curved, arranged above said dome shaped element, deflectormeans comprising an outer deflector band of conical formation the lowerpart of which is outward- 1y flared, the upper edge of said deflectorband being disposed substantially in the same plane as the peripheraledge of said dish-shaped element, and a plurality of brackets andspacing members for supporting the several elements relatively to eachother.

5. An extractor ventilator comprising in combination a short stack pipehaving a flared upper end, a base plate secured to the lower end of saidstack pipe, a horizontally disposed deflector surge plate secured tosaid stack pipe, an unapertured dome shaped element arranged above saidstack pipe, a shallow dish shaped element, the peripheral edge of whichis reversely curved, arranged above said unapertured dome shapedelement, a vertically disposed deflector surge plate arranged externallyto the peripheral edge of the dome shaped element, deflector meanscomprising an outer deflector band of conical formation the lower partof which is outwardly flared, and a plurality of brackets and spacingmembers for supporting the several elements and parts relatively to eachother.

6. An extractor ventilator comprising in com bination a short stack pipehaving a flared upper end, a base plate secured to the lower end of saidstack pipe, a horizontally disposed deflector surge plate secured tosaid stack pipe, an unapertured dome shaped element the peripheral edgeof which is reversely curved arranged above said stack pipe, a shallowdish shaped element, the peripheral edge of which is reversely curved,arranged above said unapertured dome shaped element, a verticallydisposed deflector surge plate arranged externally to the peripheraledge of the dome shaped element, deflector means surrounding saidelements comprising an outer deflector band of conical formation thelower part of which is outwardly flared, and a plurality of brackets andspacing members for supporting the several elements and parts relativelyto each other.

7. An extractor ventilator comprising in combination a short stack pipehaving aiflared upper end, a base plate secured to the lower end of said2,379,638 7 stack pipe, a horizontally disposed deflector surge platesecured to said stack pipe an unapertured dome shaped element arrangedabove said stack .pipe, a shallow dish shaped element, the peripheraledge of which is reversely curved, arranged above said unapertured domeshaped element, a vertically disposed deflector surge plate arrangedexternally to the peripheralledge of the dome shaped element, the loweredge of said surge plate being arranged in close contact with said baseplate, deflector means comprising anouter deflector band ofsubstantially cylindrical forma tion, disposed with its upper edge insubstantially the same plane as the peripheral edge of said dish-shapedelement, and a plurality of brackets and spacing members for supportingthe several elements and parts relatively to each other. I

8. An extractor ventilator comprising in combination a short stack pipehaving a flared upper end, a base-plate secured to the lower endof saidstack pipe, a horizontally disposed deflector surge plate secured tosaid stack pipe, an unapertured dome shaped element arranged above saidstack pipe, a shallow dish shaped element, the peripheral edge of whichis reversely curved, arranged above said dome shaped element, avertically disposed deflector surge plate, arranged externally to theperipheral edge of the unapertured dome

